William e



(Model.)

W. E. SPARKS.

SLIDING DOOR LOCK.

No. 331,094. Patented NOV.. 24,1885.

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N. PETRS, Phu

WILLIAM E. SPARKS, OF NEW HAVEN, CONNECTICUT, ASSIGNOR TO SARGENT & CO.,OF SAME PLACE.

SLlDING-DOOR LOCK.

SPECIFICATION forming part of Letters Patent No. 331,094, dated November24, 1885.

Application filed August 17, 1885. Serial No. 174,584. (Model.)

To @ZZ whom it may concern:

Beit known that I, WILLIAM E. SrARxs, of New Haven, in the county of NewHaven and State of Connecticut, have invented a new Improvement inSliding-Door Locks, and I do hereby declare the following, when taken inconnection with accompanying drawings" and the letters of referencemarked thereon, to be a full, clear, and exact description of the same,and which said drawings constitute part of this specification, andrepresent, in-

Figure l, a side View of the case with the plate removed, the face-platein partial section; Fig. 2,atransverse section,looking down upon thelock-bolt.

This invention relates to an improvement in sliding-door locks, theobject being to construct a slidingdoor lock having substantially thesame movement as a swingingdoor lock; and it consists in theconstruction as hereinafter described, and particularly specified in theclaim.

A is the case, constructed in the usual manner and with the face-plateB.

The keeper (not shown) is constructed in the same manner as forswinging-door locks.

D is the principal bolt, arranged to move longitudinally in the case andthrough an opening, a, in the face-plate, and adapted to be moved by akey and held by one or more tumblers, E, in the usual manner.

F is the auxiliary bolt, hung upon a pivot, b, on the principal bolt,and preferably so as to swing in a vertical plane, and having ahook-shaped nose, G, adapted to set into a recess in the nose of theprincipal bolt directly in rear of its face, and so that the auxiliarybolt will move with the principal. bolt. In the locking movement theauxiliary bolt is carried with the principal bolt until the hook G hasentered the keeper. Then an arm or shoulder, cl, on the auxiliary boltin rear of the pivot will strike against a stop, e, in the case. Then,on the completionlof the movement of the bolts, the stop will force thehook to turn upward, as shown in broken lines, Fig. l. On the withdrawalor unlocking of the bolts a second arm or shoulder, f,

on the auxiliary bolt, forward of the pivot,

strikes a stop, g, in the case, thereby causing the hook G to turn downinto the recess in the principal bolt before it is withdrawn from thekeeper.

H is a pull arranged to be moved longitudinally in the case through anopening, h, in the faceplate, preferably loop-shaped, and held in placeby guides i and 7c. A shoulder, l, on the tail, is arranged to strikelagainst the guide z', to prevent the pull from being entirely withdrawnfrom the case.

I is a lever hung upon a pivot, m, its one arm connected to the pull H,its other arm in connection with a spring, J, below the pivot in, thetendency of which is to force the pull inward, but yield to permit thepull to be forced from the case.

K is a finger-piece arranged to move longitudinally in the case, one endextending through an opening, w, on the face-plate, the

said opening being countersnnk to facilitate the movement of thefinger-piece, its inner end provided with a shoulder, o, to strikeagainst the lever I below the pivot m, so that pressing the finger-pieceK inward throws the pull H outward, as shown in broken lines, Fig. 1.When released,the reaction of the spring J draws the pull into the case.

One of the advantages of this constructionv of locks is that while itprovides a lock perfectly secure the tumblers, case, face-plate, andkeeper are substantially the same as for locks for swinging doors.

I claim- The combination, in a sliding-door lock, of the principal boltD, adapted to be moved in the usual manner, its nose recessed on oneside in rear of its face, and the auxiliary bolt F, pivoted to theprincipal bolt D, and adapted to move longitudinally with it, andconstructed with 'the hook G, adapted to set into the recess in theprincipal bolt, and with shoulders df, adapted to strike against stopsin the case, substantially as and for the purpose described.

WILLIAM E. SPARKS.

Witnesses:

GHAs. L. BALDWIN, FRANK W. WILLOUGHBY.

